In aqueous solution, $\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}(\mathrm{X})$ reacts with molecular oxygen in the presence of excess liquor $\mathrm{NH}_{3}$ to give a new complex Y. The number of unpaired electrons in $\mathrm{X}$ and $\mathrm{Y}$ are, respectively